* {
    margin: 0;
    padding: 0;
    list-style: none;
}

.heart {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100vw;
    height: 100vh;
    background-color: #232e6d;
}

ul {
    width: 500px;
    height: 500px;
}

li {
    float: left;
    width: 20px;
    height: 20px;
    border-radius: 20px;
    margin-right: 5px;
}

li:nth-child(1) {
    background-color: #ee3b3b;
    animation: love1 4s infinite 0.1s;
}

li:nth-child(2) {
    background-color: #faa755;
    animation: love2 4s infinite 0.2s;
}

li:nth-child(3) {
    background-color: #905d1d;
    animation: love3 4s infinite 0.3s;
}

li:nth-child(4) {
    background-color: #705628;
    animation: love4 4s infinite 0.4s;
}

li:nth-child(5) {
    background-color: #d5c59f;
    animation: love5 4s infinite 0.5s;
}

li:nth-child(6) {
    background-color: #bed742;
    animation: love4 4s infinite 0.6s;
}

li:nth-child(7) {
    background-color: #78a355;
    animation: love3 4s infinite 0.7s;
}

li:nth-child(8) {
    background-color: #45b97c;
    animation: love2 4s infinite 0.8s;
}

li:nth-child(9) {
    background-color: #afb4db;
    animation: love1 4s infinite 0.9s;
}

@keyframes love1 {
    30%,
    50% {
        height: 60px;
        transform: translateY(-30px);
    }
    75%,
    100% {
        height: 20px;
        transform: translateY(0px);
    }
}

@keyframes love2 {
    30%,
    50% {
        height: 125px;
        transform: translateY(-62.5px);
    }
    75%,
    100% {
        height: 20px;
        transform: translateY(0px);
    }
}

@keyframes love3 {
    30%,
    50% {
        height: 160px;
        transform: translateY(-75px);
    }
    75%,
    100% {
        height: 20px;
        transform: translateY(0px);
    }
}

@keyframes love4 {
    30%,
    50% {
        height: 180px;
        transform: translateY(-60px);
    }
    75%,
    100% {
        height: 20px;
        transform: translateY(0px);
    }
}

@keyframes love5 {
    30%,
    50% {
        height: 190px;
        transform: translateY(-45px);
    }
    75%,
    100% {
        height: 20px;
        transform: translateY(0px);
    }
}